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Valproate lamotrigine — GPhC CRA MCQ

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HardDrug InteractionsValproate lamotrigineGPhC CRA

A patient on valproate has lamotrigine added with a rapid titration schedule. What is the most important interaction to flag?

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Correct answer: BIncreased lamotrigine exposure and rash risk

This scenario assesses Valproate lamotrigine in a UK pharmacy practice context. Valproate inhibits lamotrigine metabolism and rapid titration increases serious rash risk. The best answer is Increased lamotrigine exposure and rash risk because it addresses the principal clinical, legal or safety issue before routine supply. The other options are less appropriate because they either miss the key risk, delay necessary review, or would not meet expected BNF, NICE, MEP, MHRA or GPhC practice standards.

Reference: https://www.pharmacyregulation.org/registration-assessment#stage-8-order-69